opcodes/s390-mkopc.c

   1 /* s390-mkopc.c -- Generates opcode table out of s390-opc.txt
   2    Copyright (C) 2000-2020 Free Software Foundation, Inc.
   3    Contributed by Martin Schwidefsky (schwidefsky@de.ibm.com).
   4
   5    This file is part of the GNU opcodes library.
   6
   7    This library is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 3, or (at your option)
  10    any later version.
  11
  12    It is distributed in the hope that it will be useful, but WITHOUT
  13    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  14    or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public
  15    License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this file; see the file COPYING.  If not, write to the
  19    Free Software Foundation, 51 Franklin Street - Fifth Floor, Boston,
  20    MA 02110-1301, USA.  */
  21
  22 #include <stdio.h>
  23 #include <stdlib.h>
  24 #include <string.h>
  25 #include "opcode/s390.h"
  26
  27 struct op_struct
  28   {
  29     char  opcode[16];
  30     char  mnemonic[16];
  31     char  format[16];
  32     int   mode_bits;
  33     int   min_cpu;
  34     int   flags;
  35
  36     unsigned long long sort_value;
  37     int   no_nibbles;
  38   };
  39
  40 struct op_struct *op_array;
  41 int max_ops;
  42 int no_ops;
  43
  44 static void
  45 createTable (void)
  46 {
  47   max_ops = 256;
  48   op_array = malloc (max_ops * sizeof (struct op_struct));
  49   no_ops = 0;
  50 }
  51
  52 /* `insertOpcode': insert an op_struct into sorted opcode array.  */
  53
  54 static void
  55 insertOpcode (char *opcode, char *mnemonic, char *format,
  56               int min_cpu, int mode_bits, int flags)
  57 {
  58   char *str;
  59   unsigned long long sort_value;
  60   int no_nibbles;
  61   int ix, k;
  62
  63   while (no_ops >= max_ops)
  64     {
  65       max_ops = max_ops * 2;
  66       op_array = realloc (op_array, max_ops * sizeof (struct op_struct));
  67     }
  68
  69   sort_value = 0;
  70   str = opcode;
  71   for (ix = 0; ix < 16; ix++)
  72     {
  73       if (*str >= '0' && *str <= '9')
  74         sort_value = (sort_value << 4) + (*str - '0');
  75       else if (*str >= 'a' && *str <= 'f')
  76         sort_value = (sort_value << 4) + (*str - 'a' + 10);
  77       else if (*str >= 'A' && *str <= 'F')
  78         sort_value = (sort_value << 4) + (*str - 'A' + 10);
  79       else if (*str == '?')
  80         sort_value <<= 4;
  81       else
  82         break;
  83       str ++;
  84     }
  85   sort_value <<= 4*(16 - ix);
  86   sort_value += (min_cpu << 8) + mode_bits;
  87   no_nibbles = ix;
  88   for (ix = 0; ix < no_ops; ix++)
  89     if (sort_value > op_array[ix].sort_value)
  90       break;
  91   for (k = no_ops; k > ix; k--)
  92     op_array[k] = op_array[k-1];
  93   strcpy(op_array[ix].opcode, opcode);
  94   strcpy(op_array[ix].mnemonic, mnemonic);
  95   strcpy(op_array[ix].format, format);
  96   op_array[ix].sort_value = sort_value;
  97   op_array[ix].no_nibbles = no_nibbles;
  98   op_array[ix].min_cpu = min_cpu;
  99   op_array[ix].mode_bits = mode_bits;
 100   op_array[ix].flags = flags;
 101   no_ops++;
 102 }
 103
 104 struct s390_cond_ext_format
 105 {
 106   char nibble;
 107   char extension[4];
 108 };
 109
 110 /* The mnemonic extensions for conditional jumps used to replace
 111    the '*' tag.  */
 112 #define NUM_COND_EXTENSIONS 20
 113 const struct s390_cond_ext_format s390_cond_extensions[NUM_COND_EXTENSIONS] =
 114 { { '1', "o" },    /* jump on overflow / if ones */
 115   { '2', "h" },    /* jump on A high */
 116   { '2', "p" },    /* jump on plus */
 117   { '3', "nle" },  /* jump on not low or equal */
 118   { '4', "l" },    /* jump on A low */
 119   { '4', "m" },    /* jump on minus / if mixed */
 120   { '5', "nhe" },  /* jump on not high or equal */
 121   { '6', "lh" },   /* jump on low or high */
 122   { '7', "ne" },   /* jump on A not equal B */
 123   { '7', "nz" },   /* jump on not zero / if not zeros */
 124   { '8', "e" },    /* jump on A equal B */
 125   { '8', "z" },    /* jump on zero / if zeros */
 126   { '9', "nlh" },  /* jump on not low or high */
 127   { 'a', "he" },   /* jump on high or equal */
 128   { 'b', "nl" },   /* jump on A not low */
 129   { 'b', "nm" },   /* jump on not minus / if not mixed */
 130   { 'c', "le" },   /* jump on low or equal */
 131   { 'd', "nh" },   /* jump on A not high */
 132   { 'd', "np" },   /* jump on not plus */
 133   { 'e', "no" },   /* jump on not overflow / if not ones */
 134 };
 135
 136 /* The mnemonic extensions for conditional branches used to replace
 137    the '$' tag.  */
 138 #define NUM_CRB_EXTENSIONS 12
 139 const struct s390_cond_ext_format s390_crb_extensions[NUM_CRB_EXTENSIONS] =
 140 { { '2', "h" },    /* jump on A high */
 141   { '2', "nle" },  /* jump on not low or equal */
 142   { '4', "l" },    /* jump on A low */
 143   { '4', "nhe" },  /* jump on not high or equal */
 144   { '6', "ne" },   /* jump on A not equal B */
 145   { '6', "lh" },   /* jump on low or high */
 146   { '8', "e" },    /* jump on A equal B */
 147   { '8', "nlh" },  /* jump on not low or high */
 148   { 'a', "nl" },   /* jump on A not low */
 149   { 'a', "he" },   /* jump on high or equal */
 150   { 'c', "nh" },   /* jump on A not high */
 151   { 'c', "le" },   /* jump on low or equal */
 152 };
 153
 154 /* As with insertOpcode instructions are added to the sorted opcode
 155    array.  Additionally mnemonics containing the '*<number>' tag are
 156    expanded to the set of conditional instructions described by
 157    s390_cond_extensions with the tag replaced by the respective
 158    mnemonic extensions.  */
 159
 160 static void
 161 insertExpandedMnemonic (char *opcode, char *mnemonic, char *format,
 162                         int min_cpu, int mode_bits, int flags)
 163 {
 164   char *tag;
 165   char prefix[15];
 166   char suffix[15];
 167   char number[15];
 168   int mask_start, i = 0, tag_found = 0, reading_number = 0;
 169   int number_p = 0, suffix_p = 0, prefix_p = 0;
 170   const struct s390_cond_ext_format *ext_table;
 171   int ext_table_length;
 172
 173   if (!(tag = strpbrk (mnemonic, "*$")))
 174     {
 175       insertOpcode (opcode, mnemonic, format, min_cpu, mode_bits, flags);
 176       return;
 177     }
 178
 179   while (mnemonic[i] != '\0')
 180     {
 181       if (mnemonic[i] == *tag)
 182         {
 183           if (tag_found)
 184             goto malformed_mnemonic;
 185
 186           tag_found = 1;
 187           reading_number = 1;
 188         }
 189       else
 190         switch (mnemonic[i])
 191           {
 192           case '0': case '1': case '2': case '3': case '4':
 193           case '5': case '6': case '7': case '8': case '9':
 194             if (!tag_found || !reading_number)
 195               goto malformed_mnemonic;
 196
 197             number[number_p++] = mnemonic[i];
 198             break;
 199
 200           default:
 201             if (reading_number)
 202               {
 203                 if (!number_p)
 204                   goto malformed_mnemonic;
 205                 else
 206                   reading_number = 0;
 207               }
 208
 209             if (tag_found)
 210               suffix[suffix_p++] = mnemonic[i];
 211             else
 212               prefix[prefix_p++] = mnemonic[i];
 213           }
 214       i++;
 215     }
 216
 217   prefix[prefix_p] = '\0';
 218   suffix[suffix_p] = '\0';
 219   number[number_p] = '\0';
 220
 221   if (sscanf (number, "%d", &mask_start) != 1)
 222     goto malformed_mnemonic;
 223
 224   if (mask_start & 3)
 225     {
 226       fprintf (stderr, "Conditional mask not at nibble boundary in: %s\n",
 227                mnemonic);
 228       return;
 229     }
 230
 231   mask_start >>= 2;
 232
 233   switch (*tag)
 234     {
 235     case '*':
 236       ext_table = s390_cond_extensions;
 237       ext_table_length = NUM_COND_EXTENSIONS;
 238       break;
 239     case '$':
 240       ext_table = s390_crb_extensions;
 241       ext_table_length = NUM_CRB_EXTENSIONS;
 242       break;
 243     default: fprintf (stderr, "Unknown tag char: %c\n", *tag);
 244     }
 245
 246   for (i = 0; i < ext_table_length; i++)
 247     {
 248       char new_mnemonic[15];
 249
 250       strcpy (new_mnemonic, prefix);
 251       opcode[mask_start] = ext_table[i].nibble;
 252       strcat (new_mnemonic, ext_table[i].extension);
 253       strcat (new_mnemonic, suffix);
 254       insertOpcode (opcode, new_mnemonic, format, min_cpu, mode_bits, flags);
 255     }
 256   return;
 257
 258  malformed_mnemonic:
 259   fprintf (stderr, "Malformed mnemonic: %s\n", mnemonic);
 260 }
 261
 262 static const char file_header[] =
 263   "/* The opcode table. This file was generated by s390-mkopc.\n\n"
 264   "   The format of the opcode table is:\n\n"
 265   "   NAME           OPCODE     MASK    OPERANDS\n\n"
 266   "   Name is the name of the instruction.\n"
 267   "   OPCODE is the instruction opcode.\n"
 268   "   MASK is the opcode mask; this is used to tell the disassembler\n"
 269   "     which bits in the actual opcode must match OPCODE.\n"
 270   "   OPERANDS is the list of operands.\n\n"
 271   "   The disassembler reads the table in order and prints the first\n"
 272   "   instruction which matches.\n"
 273   "   MODE_BITS - zarch or esa\n"
 274   "   MIN_CPU - number of the min cpu level required\n"
 275   "   FLAGS - instruction flags.  */\n\n"
 276   "const struct s390_opcode s390_opcodes[] =\n  {\n";
 277
 278 /* `dumpTable': write opcode table.  */
 279
 280 static void
 281 dumpTable (void)
 282 {
 283   char *str;
 284   int  ix;
 285
 286   /*  Write hash table entries (slots).  */
 287   printf ("%s", file_header);
 288
 289   for (ix = 0; ix < no_ops; ix++)
 290     {
 291       printf ("  { \"%s\", ", op_array[ix].mnemonic);
 292       for (str = op_array[ix].opcode; *str != 0; str++)
 293         if (*str == '?')
 294           *str = '0';
 295       printf ("OP%i(0x%sLL), ",
 296               op_array[ix].no_nibbles*4, op_array[ix].opcode);
 297       printf ("MASK_%s, INSTR_%s, ",
 298               op_array[ix].format, op_array[ix].format);
 299       printf ("%i, ", op_array[ix].mode_bits);
 300       printf ("%i, ", op_array[ix].min_cpu);
 301       printf ("%i}", op_array[ix].flags);
 302       if (ix < no_ops-1)
 303         printf (",\n");
 304       else
 305         printf ("\n");
 306     }
 307   printf ("};\n\n");
 308   printf ("const int s390_num_opcodes =\n");
 309   printf ("  sizeof (s390_opcodes) / sizeof (s390_opcodes[0]);\n\n");
 310 }
 311
 312 int
 313 main (void)
 314 {
 315   char currentLine[256];
 316
 317   createTable ();
 318
 319   /*  Read opcode descriptions from `stdin'.  For each mnemonic,
 320       make an entry into the opcode table.  */
 321   while (fgets (currentLine, sizeof (currentLine), stdin) != NULL)
 322     {
 323       char  opcode[16];
 324       char  mnemonic[16];
 325       char  format[16];
 326       char  description[80];
 327       char  cpu_string[16];
 328       char  modes_string[16];
 329       char  flags_string[80];
 330       int   min_cpu;
 331       int   mode_bits;
 332       int   flag_bits;
 333       int   num_matched;
 334       char  *str;
 335
 336       if (currentLine[0] == '#' || currentLine[0] == '\n')
 337         continue;
 338       memset (opcode, 0, 8);
 339       num_matched =
 340         sscanf (currentLine, "%15s %15s %15s \"%79[^\"]\" %15s %15s %79[^\n]",
 341                 opcode, mnemonic, format, description,
 342                 cpu_string, modes_string, flags_string);
 343       if (num_matched != 6 && num_matched != 7)
 344         {
 345           fprintf (stderr, "Couldn't scan line %s\n", currentLine);
 346           exit (1);
 347         }
 348
 349       if (strcmp (cpu_string, "g5") == 0
 350           || strcmp (cpu_string, "arch3") == 0)
 351         min_cpu = S390_OPCODE_G5;
 352       else if (strcmp (cpu_string, "g6") == 0)
 353         min_cpu = S390_OPCODE_G6;
 354       else if (strcmp (cpu_string, "z900") == 0
 355                || strcmp (cpu_string, "arch5") == 0)
 356         min_cpu = S390_OPCODE_Z900;
 357       else if (strcmp (cpu_string, "z990") == 0
 358                || strcmp (cpu_string, "arch6") == 0)
 359         min_cpu = S390_OPCODE_Z990;
 360       else if (strcmp (cpu_string, "z9-109") == 0)
 361         min_cpu = S390_OPCODE_Z9_109;
 362       else if (strcmp (cpu_string, "z9-ec") == 0
 363                || strcmp (cpu_string, "arch7") == 0)
 364         min_cpu = S390_OPCODE_Z9_EC;
 365       else if (strcmp (cpu_string, "z10") == 0
 366                || strcmp (cpu_string, "arch8") == 0)
 367         min_cpu = S390_OPCODE_Z10;
 368       else if (strcmp (cpu_string, "z196") == 0
 369                || strcmp (cpu_string, "arch9") == 0)
 370         min_cpu = S390_OPCODE_Z196;
 371       else if (strcmp (cpu_string, "zEC12") == 0
 372                || strcmp (cpu_string, "arch10") == 0)
 373         min_cpu = S390_OPCODE_ZEC12;
 374       else if (strcmp (cpu_string, "z13") == 0
 375                || strcmp (cpu_string, "arch11") == 0)
 376         min_cpu = S390_OPCODE_Z13;
 377       else if (strcmp (cpu_string, "z14") == 0
 378                || strcmp (cpu_string, "arch12") == 0)
 379         min_cpu = S390_OPCODE_ARCH12;
 380       else if (strcmp (cpu_string, "z15") == 0
 381                || strcmp (cpu_string, "arch13") == 0)
 382         min_cpu = S390_OPCODE_ARCH13;
 383       else {
 384         fprintf (stderr, "Couldn't parse cpu string %s\n", cpu_string);
 385         exit (1);
 386       }
 387
 388       str = modes_string;
 389       mode_bits = 0;
 390       do {
 391         if (strncmp (str, "esa", 3) == 0
 392             && (str[3] == 0 || str[3] == ',')) {
 393           mode_bits |= 1 << S390_OPCODE_ESA;
 394           str += 3;
 395         } else if (strncmp (str, "zarch", 5) == 0
 396                    && (str[5] == 0 || str[5] == ',')) {
 397           mode_bits |= 1 << S390_OPCODE_ZARCH;
 398           str += 5;
 399         } else {
 400           fprintf (stderr, "Couldn't parse modes string %s\n",
 401                    modes_string);
 402           exit (1);
 403         }
 404         if (*str == ',')
 405           str++;
 406       } while (*str != 0);
 407
 408       flag_bits = 0;
 409
 410       if (num_matched == 7)
 411         {
 412           str = flags_string;
 413           do {
 414             if (strncmp (str, "optparm", 7) == 0
 415                 && (str[7] == 0 || str[7] == ',')) {
 416               flag_bits |= S390_INSTR_FLAG_OPTPARM;
 417               str += 7;
 418             } else if (strncmp (str, "optparm2", 8) == 0
 419                        && (str[8] == 0 || str[8] == ',')) {
 420               flag_bits |= S390_INSTR_FLAG_OPTPARM2;
 421               str += 8;
 422             } else if (strncmp (str, "htm", 3) == 0
 423                        && (str[3] == 0 || str[3] == ',')) {
 424               flag_bits |= S390_INSTR_FLAG_HTM;
 425               str += 3;
 426             } else if (strncmp (str, "vx", 2) == 0
 427                        && (str[2] == 0 || str[2] == ',')) {
 428               flag_bits |= S390_INSTR_FLAG_VX;
 429               str += 2;
 430             } else {
 431               fprintf (stderr, "Couldn't parse flags string %s\n",
 432                        flags_string);
 433               exit (1);
 434             }
 435             if (*str == ',')
 436               str++;
 437           } while (*str != 0);
 438         }
 439       insertExpandedMnemonic (opcode, mnemonic, format, min_cpu, mode_bits, flag_bits);
 440     }
 441
 442   dumpTable ();
 443   return 0;
 444 }